21029854282 has 8 divisors (see below), whose sum is σ = 31775035716. Its totient is φ = 10438175712.

The previous prime is 21029854187. The next prime is 21029854283. The reversal of 21029854282 is 28245892012.

It can be written as a sum of positive squares in 2 ways, for example, as 20984709321 + 45144961 = 144861^2 + 6719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21029854282² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21029854283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38375373 + ... + 38375920.

Almost surely, 2^21029854282 is an apocalyptic number.

21029854282 is a deficient number, since it is larger than the sum of its proper divisors (10745181434).

21029854282 is a wasteful number, since it uses less digits than its factorization.

21029854282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76751432.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 21029854282 in words is "twenty-one billion, twenty-nine million, eight hundred fifty-four thousand, two hundred eighty-two".